Your tax liability, and hence your assets and income are not always completely confidential in Switzerland!

In certain Cantons your confidential details can be seen by anyone - for a fee!

http://www.beobachter.ch/wohnen/arti...e-steuerdaten/

Google translation:
So public is your tax information. Issue: Beobachter Magazine 11/05

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Preview for a third party without restriction, respectively, with minor conditions possible

Schwyz, Neuchâtel, Vaud

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Preview for third parties with restrictions possible

Zurich: Taxpayers may blocked files; Bern is at the discretion of individual communities, Lucerne, Uri: Data may not be published, Schaffhausen, Valais access rights depending on the location, Freiburg: only possible for the income and property taxation of natural persons; St. Gallen, Appenzell Outer Rhodes: Interest proof needed taxpayer is notified of inspection

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Basically, no access for third parties

Aargau, Obwalden, Nidwalden, Glarus, train, Solothurn, Basel-Stadt, Basel-Land, Grisons, Ticino, Appenzell Inner Rhodes, Thurgau, Geneva and Jura.
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Your tax forms are not secret at all. It's one of the silly aspects of living in Switzerland.

But everyone can write a letter with signature stating that informations are to be kept with the tax department only.

Nowadays if someone is asking for information, you only get the amount of the paid tax, meaning no figures. Earlier in the 80's they gave the whole tax forms including bank statements to anyone who wanted them, e.g your neighbor